Shearing apparatus for rolled iron, &amp;c.



H. JOHN. SHBABING APPARATUS POB. ROLLED IRON, 6:0#

APPLICATION FILED NOV. 27, 1907.

Patented Apr. 27, 1909.

2 SHEETS-SHEET 1.

H. JOHN. SHEARING APPARATUS POR ROLLED IRON, dw.

APPLIUATIQN FILED NOV. 27,1907. Patented Apr' A 2 SHEETS-SHEET 2.

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viSpeciieadnlon of Letters Patent.

Patented Aprila?, `19o9.

r Y Application filed' November 27, 1907. Serial No. 404,137.

To all whom it may concern: y

Be it known that I, HUGO JoHN,manufac turer, a subject of the King ofPrussia, German Emperor, residing at Erfurt, Kingdom of Prussia, GermanEmpire,haveinvented certain new and useful Improvements in 0r Relatingto Shearing vilpparatusfor Rolled Iron and the Like, of which thefollowing is a specification.

The present invention relates to improvements in apparatus forcuttingiron girders .having double anges and especially U 'or channelirons, the apparatus being capable of cutting the iron either at rightangles to its length or at any other desired angle, thel cuttingoperation being effected by detaching or separating each half of the Uor channel iron in one operation, that/is to say, the straight orangular cut is completed in two consecutive cutsor operations. Thedevice is provided in the wellknown manner with a stationary lateralcutter, a horizontal bottom cutter which is also stationary, and asingle upper cutter which is movable at an angle of 4:50 relatively tothe lateral and bottom cutters and having two cutting edges which areparallel tothe lateral and-bottom cutters. The cutting edges of all ofthese cutters are in the same vertical plane, and the cutters during theshearing'action engage throughout the extent of their dat cuttingsurfaces with the U or channel ironas distinguished from such apparatuswherein the cutting edges are wedgeshaped Vand which operate to bite offthe iron.

An essential feature of the present invention which distinguishes itfrom other cutv ting apparatus is, that theadjustable upper cutter isnot carried to the level of the cutting edges of the lateral and bottomcutters and then carriedpast them, but on the other hand, such uppercutter is `caused to enetrate the iron only to such a depth suibient topermit the pressure exerted upon the web and flange to eiiect theseparation. During such cutting"operatiom-the cutting fof the U orchannel iron whether straight orl at an angle is effected in twoconsecutive operations, one-half of the web and the adjoining i angebeing separated during the rst cut while the second 4half of the webyandthe opposite ange are separated during thesubsequent ori second out.Such a cutting of a U or channel iron in a straight line or at an anglein two consecutivecutting operations involves the use of an upper andalso a bottom cutter the web cutting portion of which is of a length atleast 4equal to half of the height of the Vweb of the U or channel iron.Cutters so proportioned have the advantage that one in the same groupcan be used for cutting U or channel irons having webs ofdiferent'heights in two consecutive operations. Moreover, according tocutting apparatus as heretofore constructed, the deformaticnof the ironduring the cutting operationA is a disadvantage, the web portion which.is separated or detached after the rst cutting operation being stillsuspended or connected to the web and is bent off, because in such U orchannel iron cutting devices with flat cutters, the'U-iron or channelrests on the bottom cutter'and on the lateral cutter, the nupper cutterthat is the only movable one, pressing away the unsupported portion ofthe iron from the said supported portion. The nearer the upper cutterapproaches the other cutter, the greater will be vthe deformation. Thisdeformation may be so great that the portion cut off can no vlonger bepulled back through the working opening of the angle cutter, the resultbeing that the iron is practically useless.

rlhe object of this invention is to avoid sucha disadvantage, `that is,it is the purposeto reduce or minimize as far as possible thedeformation produced during the first cutting operation and to entirelyeliminate such deformation during the subsequent cutting operation and,at the same time, it enables the cutting to be effected at the greatestpossible angle. As the upper cutter is moved toward the lateral andbottom cutters Vonly for a distance sutiicient to separate the halfofthe U or channel iron, deformation of that half of the girderwhich isseparated by the first cut is very small, and furthermore, during thesecond cutting operation, the slightly bent-off portion of the iron orgirder finds a support on the bottom cutter and is re-shaped orstraightened by the pressure exerted thereon'by the upper cutter as itdescends upon the upper side of the web. rEhe result of such movementis, that in separating the U orl channel iron, especially when cuttingat an angle, neither the cutting-off portion nor the remaining sectionshow any deformation vatv the point of cutting or separation, the cutsurface being smooth and regular so that neither the cutquires anysubsequent treatment before use.

Furthermore, according to the present invention, the cutting` device iscapable of cutting U or channel irons at any desired angle, even at anangle exceeding 450, as the cutters have cutting edges of full thicknessand width whereas the cutting devices neretofore used were provided withwedge-shaped cutters and owing to the reduction of the thickness of thecutting' edges by reason of such wedge-shape, it was only possible tocut straight or at a Vsmall angle.

In the following drawing: Figures l and 2 U or channel iron or girdeapplied to cutters arranged and constructed in accordance with thepresent invention; Fig. 23 illustrates graphically the action of thecutter on the U or channel iron in making the first cut; Figs. et and 5illustrate a machine embodying a complete set of cutters; Fig. G is adiagrammatic view showing the deformation of a girder when sheared bycertain forms of cutting apparatus as heretofore known; F ig. 7 is asectional view of a U or channel iron showing the tearing of the webduev to the extreme deformation; ltig. o is a sectional view of the samechannel iron showing the slight deformation which is caused, accordingto the present invei'ition, during the first cutting operation; Fig. Slillustrates the contour of the severed end olf the U or channel iron aspracticed by the present invention.

The angle cutting device constructed in accordance with the presentinvention is illustrated in the accompanying drawing as comprising anupper cutter a. which is movable obliquely and downwardly at an angle of45 and having thereon the two cutting edges l and 3 arranged at rightangles with respect to each other and having a width as shown in Figs.`l and 2, such width being equal to or preferably slightly greater thanhalf of the space between the flanges c, c of the U or channel girder dto be cut.

-A lateral stationary cutter e has a cutting edge 2, and a stationarybottom cutter f has a cutting edge 4f. The cut-ting edges l, 2, 3 and tof the cutters c, e, and f, respectively, are situated in the samevertical plane A--l The entire flat surfaces forming the cutting edgesof the several cutters engage the girder to be cut.

Should it be desirable to cut a girder at an angle, for instance in thedirection A-B, that is to say, at an angle ,8 shown in Fig. l, the uppercutter a engages with the fiat surfaces of its cutting edges l and 3,with the left hand half of the web and the left hand flange c of the Uor channel iron d which. is supported by the stationary lateral cutter eand the bottom cutter f which is also stationary. During the obliquedescending movement of the upper cutter in cooperation with the abutmentprovided by are fragmentary vdetail views showing a f the bottom cutter,the left hand half of the web is acted upon to an extent equal to thewidth of the upper cutter, that is to say, during the first cut up tothe point 2/ as shown in Figs. l and irl. lil/'hen the upper cutterpresses against the left hand halt of the web and in an obliquedirection, the right hand half of the web is still uncut, the web of thegirder being consequently bent at the .l point g/ where the upper cutterengages the l tion cannot be withdrawn through web for, at that point,the material is still suspended or connected to the uncut portion of theweb and as the upper cutter moves in an oblique direction, the materialis thereby bent at y. This bending results in a certain deformatioii ofthe girder, the amount of deformation being proportional to the extentof the do vnward movement of the upper cutter. "When said down wardmovement is such that the upper cutter passes the cutting edges of thelateraly and bottom cutters completely, the deformation of the girder isso great that the girder with its partly cut portlic opening providedfor the cutters, and the web is usually torn deeply because of the outend falling ott as shown diagrammatically in Fig. 3. According to thepresent invention, however, the oblique movement of the upper cutter islimited to such an vexteut that the U or channel iron is just separatedat one side during the first cutting operation so that the deformationwill be considerably less as shown in Fig. S, Fig. '7 showing the extentto which the half lirst separated is torn in those cases where thecutters com plctely pass one another. The result shown in Fig. 8 is dueto the fact that the cutters do not pass one another, but the severingis obtained by the pressure produced so that the remaining portion ofthe girder is bent less. The second cut which will completely sever orseparate the two sections of the girder will. completely neutralize theslight deformation which is produced by the first cutting operation. lnorder to more completely describe the cutting action, it might be statedthat there are two possible ways of carrying out the second cut throughthe girder. Either the U or channel girder l is reversed, that is tosay, turned in a horizontal plane through an angle of 180O and thenintroduced into the same cutting' device on which the `upper cutter cacts upon the portion of the web remaining, the cutting edge l incooperation with the cutting edge 9 of the lateral cutter c, the ilangec and the cutting edge 3 of the upper cutter a, being in cooperationwith the cutting edge 4- of the. bottom cutter f for, owing to thereversal of the girder al, the tiange. c assumes the position previouslyoccupied by the iiange c. Instead of turning the girder, however, thecutting device may be turned to an angle of 180 after the girder hasbeen withdrawn therefrom, the

il (l girder being again positioned Whereby the cutters a, e and fassume the position shown in Fig. 2. The upper cutter e during itsdescent so operates as to cause its cutting edge l to engage theremaining uncut flange c and cooperating With the cutting edge 2 of thelateral cutter e serves to separate this lange o. The cutting edge 3 ofthe descending upper cutter a in coperation with the cutting edge 4t ofthe bottom cutter j causes the remaining portion of the Web from thepoint y to the flange c to be severed. During the'second cut, only thebent portion w of the U or channel girder finds support on the bottomcutter f as an abutment, and at that point y Where the separation andconsequently the bending started at the irst cutting operation, andduring the descent of the upper cutter, a pressure is exerted 0n the Uor channel iron. In that Way, the bending at thepoint y is completelyneutralized, and that portion of the partially divided girder Which-isbent during the first cut, is re-bent into the plane of the girder.Thatportion of the girder on which the upper cutter rests during thesecond cut is not deformed at all, for in this case, a separating actiononly takes place.

Fig. 9 shows the shape of the U or channel.- shaped girder after itsseparation by an apparatus constructed in accordance vvith the presentinvention, and it Will be observed that there is no visible deformation.

Figs. 4 and 5 illustrate a girder cutter having four single groups ofcutting devices in order to enable thegirders or beams to be cut atreverse angles Without requiring the girder to be turned over.

I claim as my invention:

An apparatus for shearing channel iron girders at different angles andin tWo consecutive operations comprising a suitable supporting frameprovided With an opening shaped to receivea bar having the tWo lateralflanges up turned, a Xed lovver cutter arranged to act upon the underside of the Web, a fixed lateral cutter arranged to coperate with one ofsaid flanges, and an ob- Vliquely movable'upper cutter, all of saidcutters lhaving rectangular cutting edges lying in the same plane, theupper cutter being of a Width Which is at least as great as half theWidth of the web, the oblique movement of the upper cutter being limitedso that its lower cutting edge does not pass the coperating cutting edgeof the lovver cutter Whereby that portion of the Web acted on shall besevered by the pressure exerted thereon by the upper cutter, the bottomcutter serving as a support during the second cutting operation for thatportion of the web Which is slightly deformed during the first cuttingoperation, whereby the deformation is neutralized.

In testimony Whereofl have hereunto set my hand in presence of twosubscribing Witnesses. Y

HUGO JOHN.

Witnesses FRIEDRICH Rrrzn, KARL HALEGKER.

